<template>
    <el-container class="home-container">
    <!-- 头部区域 -->
      <el-header>
        <div>
           <img src="../assets/1.jpg" alt="" class="img-wangcai">
           <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
      </el-header>
    <!-- 主体区域 -->
      <el-container>
         <!-- 侧边栏 -->
         <el-aside :width="iscollapse ? '64px' : '200px'">
            <div class="toggle-button" @click="toggle">|||</div>
             <!-- 侧边栏菜单区域 -->
            <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="iscollapse" :collapse-transition="false" router :default-active="activepath">
                <!-- 一级菜单 -->
                <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
                    <!-- 一级菜单的模板区 -->
                    <template slot="title">
                        <!-- 图标 -->
                       <i class="el-icon-location"></i>
                       <!-- 文本 -->
                       <span>{{item.authName}}</span>
                    </template>
                     <!-- 二级菜单 -->
                    <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children"
                    :key="subItem.id" @click="savestate('/' + subItem.path)">
                       <template slot="title">
                        <!-- 图标 -->
                       <i class="el-icon-menu"></i>
                       <!-- 文本 -->
                       <span>{{subItem.authName}}</span>
                    </template>
                    </el-menu-item>
                </el-submenu>
            </el-menu>
        </el-aside>
         <!-- 右侧主体区域 -->
         <el-main>
           <!-- 路由占位符 -->
           <router-view></router-view>
         </el-main>
      </el-container>
    </el-container>
</template>

<script>
export default {
  data () {
    return {
      menuList: [],
      iscollapse: false,
      activepath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activepath = window.sessionStorage.getItem('activepath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 点击按钮，切换菜单的折叠
    toggle () {
      this.iscollapse = !this.iscollapse
    },
    savestate (activepath) {
      window.sessionStorage.setItem('activepath', activepath)
      this.activepath = activepath
    }
  }
}
</script>

<style lang="less" scoped>
.img-wangcai {
    width: 55px;
    height: 55px;
    border-radius: 50%;
}
.el-header {
    background-color: #373D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div{
        display: flex;
        align-items: center;
        span {
            margin-left: 15px;
        }
    }
}
.el-aside {
    background-color: #333744;
    .el-menu {
        border-right: none;
    }
}
.el-main {
    background-color: #eaedf1;
}
.home-container {
    height: 100%;
}
.iconfont {
    margin-right: 10px;
}
.toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
